Feed additive "Konyr-su" to increase the productivity of dairy calves

The article describes the results of research on the development and study of the effect of feed additives on the productivity of cattle, specifically dairy calves. Currently, the issue of increasing the dairy productivity of cows is acute in the Republic of Kazakhstan. The authors have developed a feed additive based on baking yeast and humic substances to increase the dairy productivity of livestock. The composition of the feed additive includes domestic potassium humate produced by NPO Kaztechnougol LLP, obtained from brown coal from the Ekibastuz deposit with content of humic substances up to 56% by dry matter. The components of the nutrient substrate, the yeast brand, the concentration of potassium humate optimizing the accumulation of yeast biomass during cultivation, fermentation parameters, and the cultivation period were selected for the manufacture of the lump additive. For the first time, the effectiveness of the feed additive was tested when used on calves of the dairy period, and its effect on metabolic processes and increasing weight gain was studied. Laboratory tests of the effectiveness of the feed additive on white mongrel mice showed that the live weight of mice in the experimental groups has an average of 27.2 ± 0.4, which is significantly higher than in the control group by 2.8 g. In the production experiment for three months in Kamyshenka LLP on calves of the Holstein-Frisian breed at the age of 2 months, the effectiveness was determined as feed additives for calves. The average daily increase in the experimental group was on average at the level of 895, 856, and 780 g, which is higher than the increase in the control group by 75 g, 126 g, and 130 g, respectively. The live weight of calves of the experimental group increased by 6 kg from the first month of use, by the end of the experiment the difference was 13.1 kg or 7.9%. The revealed trend of increasing weight gain indicates the normalization of metabolism during the drinking of the feed additive "Konyr-su" and in the subsequent period.